ljungdajrll



Oct. 19 1926.

w. K. LJUNGDAHL* APPARATUS FOR DXS'IILLAION Filed fune @m w w26;

W. K. 'LJUNGDAHL APPARATUS FOR DISTILLATION Filed June 1.3"I V1.925

l2 Sheets-Sheet 2 lll'atented @cta 19g, 1926;

'WXLLIAM n. naunennnn, or ron'rnnnn onction.

application lled Enne 13, 1923.' Serial No. 645,135.

l' invention relates to distillation of orofthe gaseous products of the drying proc- .mattenA and its main object is to' pro ess, andalso of certain liquids that arean apparatus therefor which is applica mainly carried in suspension therein. to any'dry" kiln for lumber whereby such There is another type et' apparatus known 'ile condensates as are driven on from' as the aspirator kiln that is 'characterized e0 od by heat in the process of kiln drying by provision of means for taking ed the gasy be recovered and'saved as a comrnere'ons products of the drying process from the byproduct. f I tppof kiln, the liquids last named being pre- 'ln the operation of dry kilns as at present cipitate'd, .for the most part, to the floor of cticed the only/,object proposed is to de- 'the kiln. That type of kiln is indicated by c5 ate the contents of the kiln. Consethe numeral 2 in Figure lll of the durar/clings.l icntly, there is not only e. loss of valuable lily invention is designed to be applied to densates, but where kilns are operated on any type of kiln, and the two types above considerable 'scale there is discharged lindicated are, in some one or`r another form to' the atmosphere a volume of dense vapor of modication, believed -to comprehend sub- X43 nich is objectionable about a saw mill, 'and stantiallyall forms of kiln at present in use. to dissipate which is at all times. more' or It is deemed unnecessary to describel or imprscticable, and oftentimes impos "to illustrate at length any kiln construction e. l vfurther than tol indicate thatA all kilns are y my invention, the atmosphere is kept provided with radiator pipes 3 which are, in 35. i' of such vapor, and that not only Witlicpei'ation, kept supplied with steam from a .t enpensdbut also-at a profit derivable suitable source, not' shown. Kilns of the the value of by-products recovered type l are brought into operative communi by' the employment of said invention.' 'cation with a common discharge duct 42, While i in order to realize the saving of expense those of the type 2 are provided with as- @il above indicated', the means employed must p rator pipes 5 which are united in like manbe used with a view to all possible economy ner, the members e and 5 being adapted, re- .in eperatlbn, andthat is therefore made un spectively, for the discharge of the gaseous important feature of my invention. 'u vapors developed in the dr 7ing process from j What constitutes my invention Will be ihe application of. heat to contents of the hereinafter described in detail and succinctly kilns, setiorth in the appended claims. h For application to any form of .kiln my in the accompanying drawings, invention comprises as a primal element a lligure l is a' vertical section of a portion fan iti which, being illustrated diagrammati# 35 olf one form of dry kiln, and showing my cally, maybe of any preferred design and 90 apparatus mainly in diagrammatical iorino construction suitable for `exhaust of air and illustration applied'thereto in operative relavapors having condensible portions 'with tionship. The `kiln shown in this figure is which, during the drying process, the air is one 0f the so calledblower type. laden or cominingledfroni the kiln or kilns ,Figure H is e diagrammatical top planet' with 'which it is placed in operative eoni- 95 y par-t of a group of kilns of the 'type shown in munication; .The fan also is preferably a Figure li f rotary one, which maybe adapted, if delligure lll illustrates similarly* to Figure sired, to be drivenv by the exhaust steam ,W l a ydetached dry kiln of the aspirator type. from lthe pipes 3, or by any other available j Figure lV is avertical section of one' of power, and is connected WithV the kiln as .100 the condensate separators of the kind preerthrough its duct or the united aspirator ably used throughout my apparatus for seppipes 5, according to the type oi kiln emarating liquids of different specific gravities.' ployed'.v The tan discharge is made into a Referring to the numerals on the drawings, "pipe or'conduit 7 which assumes, Within a indicates, in Figures I and ll, a kiln oi" water-cooled container, the form ot a coil 8, 105 that type. known as a blower kiln. It is sus- `-said coil4 and its containerl constituting a ceptible of considerable variation as to decondenser 9.' `i tails of structure and design, but the typeA The condense! coil 8 leads through a conrv is characterized by a discharge, substantially nectmgpipe `iO,comprising a depressed por- )5 from the bottom or lower part oi the kiln, tion or gooseneclr ll, into the' lower end U0 neonata .tion'ol the diaphragmfis' vte;'separate the thence discharged, as through an 'overdovv waste valpe '428.' lln the. seid first compartnient'Stnecondensates lfloat 'upon top of thel water and areskimmed' olli' into the separator sides thro vhja pipe-50. 'lhe'separator 46 (lensingl system comprising coils 73 and 74, respectively enclosed in cases 75 and 76, which, with their respective coils, constitute condensers.' The coils 73 and 74 communicate one with the other by a cose-neck 77 which leads by way vof a suita ly bent pipe 77'* into a receivingr pa'n`78, Whichin turn makes discharge through a cock-controlled ,pipe 79 into the reto-rt of the still 32.

The coil 74e, "by a pipe 80, makes operan is preside Vwith pipes 7,51 and 52, corre- (tive communication with a set of separators spending `tothe pipes t8v and() of the-sep crater d5, and its unctionfbeingprecisely like that of the separator d5, is intended.

to su i pleurent that vof thcfseparator last I naine with a view to eeeting a more coinl plete separation 'of condensates from tlf' Waterv with 'whichtheyare associated;

The pipe 52 discharges into a storage tank fwhich may be one oli' ,any suitable Aand preferred construction adapted tohold acl.` cumulation of condensates until they are collected in sutlicient'quantity for distillation. The; tank-53 should be of capacity sulcienty to accommodate accumulation of condensetestrom the fan 6, lthe goose-neck 1l, and,

case out need, the kiln, to meet the require- I vancients et periodic operation of the still 32.

lill

titl

j A, storage tank .54, similiar to the tank 53 isA provided 'to receive accumulation of condensates freni' the scrubber l2,v within .the container of which a level-controllingpipej'rises ap roximatel to the top of the pipe 10, but eloW the ood of -its dis- 4'chargeterminal 15, above which the liquid level in' the scrubber should fnotv'rise. 'The ipe 55 vleads intoa' separator 57, which in turn, by.a 'pipe v58 leads into a; second separator "535g Which.= discharges": through. a pipe 60 into the tankeli. The; separators 57 and 59 correspond :in all respects to the separators d5 and 46and are, likev them, provided with Waste pipes and with skimmingppipes indicated by numerals 6l and 62, lespectively.. y

The storage tanks '5 3aid5coinmuiiicate, respectively, through". cock-controlled ,pipes 63 and 6d With thestill: 32,?and are al'soipro-fy vided, respectively, with heating coils 65?(y and'v 66 *which` respectively communicate through intercommunicating cock-controlled pipes 67. and 68- with the yvaterseparatoi 36 below itswater level, say,y for eXamp1e,

with its pipe connection with .its Valve 37, as illustrated'. Each of the coils 65 and-v 66 is provided with a Waste pipe 69 and 70, respectively', for outflow of' Water'vvhenever said lcoils-are brought into requisition for heating the contents of the ftank's `53 and 54 to desired liquidity.

"ll`he still 32 may be of any usual or preferred type.' lt isillustrated as,y provided with a rectifying columnl of -the vusual f-ckind which 'is in operative communicationthrough ,a pine 72 with' a fractional con-v form and function to the separators and 46, for exam le, already described, and `Whose -otlilze is o take care of the volatiles of of the condensates derivable from the still. v:The condenser 'cases :75 and 76 yare kept 4,coole by Water supplied by the pipe 27, and areconnected by a cockcontrolled ipe S35- each condenser beingl provided Wit a Waste lpipe 84'and 85. The pipe 85 is provided with a vcock 86, by manipulation of which andl of' the cockof the pipe 83 the condenscrs of the fractional condensin eye",

tem may be,operatedindependently o; each y other.' l l -I In view of thetoregoing spciication the operation of my inyention-may be loriedy described as follows. A

In respect to any dry'hiln it isinecessary for the attachment of my apparatus only to provide a single outlet, such as the discharge duct 4, as shown in Figure l tor example,

.or its 'equivalent represented in a conunonV pipev connecting the aspirator pipes 5. flo

such an outletltlie' apparatus, substantially' as described, is connected lWitbfthe ultimate mit eiecin operation, of delivering a 'constantf How of" air purified of the Avapor ot con 'densates with whichfit is'laden when it issues roIr'ltheductd, and which, were it dischargedgatifonce into the atmosphere, would diffuse `"the" 'objectinal vaporv mentioned in the foreging" generaly statement. l'n the Apreferred vcomplete organization of my ap paratus evenj'thevapor of steam from the Vradiators 3 is alsoJco'ndensed before liberation, by operation ofthe Water separator 36. f

ffflh'e'v'endA accomplished 1of purifyin the atmosphere about dry kilns is in'itself an 'ma :important one, but they recoveringl ofthe j condensates in the accomplishment of it effects the saving of a commercia'l'product,

which, besides other advantages it adorais,

will pay-a profit onthe first cost of the epparatus 4and on the-,cost of its upkeep andV operation'. y [By my method p v and gasis subjectedixto separation in' passing;l through the condenser 9 and the'scrubbenso that onl airis liberated through the vens tilator 1 in constant flow and vsfithout` in'- jurious -restriction of the volume of gawous discharge', from the kiln. The producingot a crude first product, soobtainedis a conithe Hovv of commingled air plaie utility' in iisd?, so that, if 'For :my rer som, i, wcm, ihwmod undezsiriihi in muy on ihn. (iisiizzitimi of hzit pi'mhic; at, the piace of prmhictiom it migrh neve'eihiess he wihectml into (-olitainms and ilzmspox'ed 10 a distance, in he (is'iiled. However, the mi vantges of locali distillation, the sin'iplicity of the pa'ouvss for effvcting the Smm, an thi, ei-Uiion'iy pxefiemml in the utilization therein 0i' othorwisa wustl, steam, :1re 0hn vious zuivantgexs pi'vsvnml hy my inw-mimi in its ultimate (fon'iplouness.

if@ is damned proper to add that while the Separation obtained through thm eixipiuymuni of ih@ condenser 9 :imi thi, svruhhvr E2 is :1 continuous upm-ation vuilicirh-nf with ihfii, of thi fh'v kiln to which said apprirzi'us is atmched, hu provost; of llistiihifimi is a peieic opeiaion nml hr. wiri'ii-fi mit aaiabi ixiim'vaisi t0 suit, he Crmvenienwe of the operaia?.

- what daim is:

i. .in u uiitfij1 wool iistiliaifm pimt the conbinaion wih a dry kin providid with steam radiator-s oriwuting the ruime, (if a1 coihiit in operative comrmmir-:itinn at om, and with he iciin :md making diszchzuge imo the atmospixere, means within the, mmduit for Separating und iiqiuziying zon- (ielisinie portions from the, gaseous How tixeeichrough, a Stili adaptm o z-ec'eive he Separaed condensates, and means for hum ing the stiii operative from the exhaust steam of the, radiators of the kiln .and in op erative communication therewith.

2. En :i unitary Wood fiistiiiatimi piani,

he combination with a dry kim provided duit in opamtive cmmimicatmn wiii n. kin at one end anni making communication at Wiih Closed steam heatinfr means, of u conits otmr and im@ the open nmsphere, niezins within he conduit for confensing the comifmssibie pmim from the as passing he'relhzough i'imn tha hihi, moans for wiihdr'awing iha @as from ih@ kiln Lhiough said ffuwhiii and illieschurging it after 'he ccmensibh, pm'ions aw svpzuuimi therefrom 'mio the mpi-,n atximsphm-e withuu rehiru-lng it to thi, hiin, nmz-mie of storage for the .impur-(inni coiuhrnsnvs cmnmlmicing with Suid cmnluit, :i stili communinating with said irivzms of sm'zigi, :i water Separator cmmmmicaling with smid steam hva()- in;r :mmm :md upm-:nim upm the exhaust. steam 0i (hikii.: hunting! means. :and :i cioseii hi-:iing (fhfimhvi wihin the siiii in opvmtive mmmuliivaiimu wih ihn .Liepur'am' whereby thi siii! muy hr heated hy ihn steam 1ishurgjmi from ha hihi.

1). in :i miiw'j; wund diiiiziion :appal'aituf," thc mmhimiilm of a dry hihi, aimed :fiumi :hmmm m hesiiingg izilmy :mans for wihdi'mving vai-ow having wmfimisihh. p01'- iuns from 1in, hihi and comhxr-,ving them withou i'vti'nu to 1hr: kiki toward a point of riisr'hm'g@ im() tim outside anmsphvr, mmm mfilwmiw wih Suid last mentioned, means im i-mirhmsing Suid minihmsihie pox'- imis from thf mimi-5 mim-f, they wach the point of discharge into the phen, a Sii in nperativc, assm'iuion with said c@ ,fhmszmf separating! moans and adapted to rvvwiv@ the Cimdensaiics hs'erefi'om, ami means m "Ommm'iicatifm "meinem smid. sriil ami snhi swam hefiii'if; menus im" the, iin when-ahy tim kiin muy receive i151 the Stimm HF-cha y Y from rhs, kiii'i. l

in esimo'ny Wherfrm, i have, hereunto sm, my hand.

heat imm 

